This week Ol’s feeling mopey about the misery of trying to buy a flat in London. Shouldn’t we just build lots of new houses everywhere? Also, celebrity buffoon will.i.am’s been at the babble-aid, teaming up with Coca-Cola & Harrods to sell recycled backpacks that cost… oh, just wait till Arabella tells you how much.

Sustainababble is a weekly podcast for and by greeny types who don’t really know what’s going on. It comes out every Monday.